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flatbed45013
New User
Sep 2, 2011, 3:34 AM
Post #1 of 7
(1560 views)
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I have a 1997 Grand Prix, That is overheating. Guess this started when I changed the Intake gaskets And upper Intake.
It runs about half to 3/4 way hot. with no thermostat. Fans work water flows ? An y Ideas
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zmame
Veteran
/ Moderator
Sep 2, 2011, 4:23 AM
Post #2 of 7
(1545 views)
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Did it overheat before the intake gaskets where done? if not it could be just air in the system. Air locks can be tricky to get out I belive most GM's have a bleeder valve somewhere to bleed some of the air out. leave the cap off and run it after bleeding to let any excess air out.
I use a vacuum fill system, works great. It sucks down the whole system and will also give you a indication of there are any leaks. Pretty much elimiates the chances of airlock(picture below). Failing that I would gusse you might have headgasket issues would have it Chemical tested and pressure tested.
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flatbed45013
New User
Sep 2, 2011, 8:13 AM
Post #4 of 7
(1534 views)
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Thanks for the info. I have done all this. And haven't had any luck. Not leaking Just getting. Hot. I was wondering, What speed should the cooling fans run at. To me, They look a little slow when watching.
And I know I forgot to mansion, I had to bypass the heater core. Until I replace it. I would think this wouldn't cause a problem from Pasted Experience. I could be wrong.
I do however find that the bottom of the radiator is at 240 And the top is about 175.
Thanks for the help.
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flatbed45013
New User
Sep 2, 2011, 8:32 AM
Post #6 of 7
(1527 views)
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I have a thermal Laser light that shots a beam. And that's what it reads. Sorry it has me stumped. Been working on Auto's for 35 yrs.
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 2, 2011, 11:18 AM
Post #7 of 7
(1525 views)
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Then you need to throw that laser away because the coolant didn't get heated while it was in the radiator.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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